Cambridge Audio Azur 851D DAC Azur 851D Holds its Own Against Higher-Priced DACs and Provides Immediate Bluetooth Compatibility: All Audio Upsampled to 24-bit/384k Dual Analog Devices AD1955 DACs, Asynchronous USB Input, Built-In Earphone Amplifier, and Excellent Toroidal Transformer: Azur 851D an Audiophile Workhorse Cambridge Audio's reference DAC is built like a fortress, outperforms higher-priced competing DACs, consists of an impressive asynchronous USB input and integrated headset amplifier, and makes digital noise fine-tuned. Azur 851D also manages digital audio from almost any source you could care to link to it. Sonically, it works to uncover every last detail hidden in your music. Its high-performance tricks start with second-generation ATF upsampling that upsamples all audio to 24-bit/384kHz. From MP3 to high-res downloads, you'll hear brand-new colors and textures in addition to greater dynamics and sensational tonal balance. Remarkably flexible, Azur 851D comes loaded with digital inputs, including coaxial, Toslink optical, BNC coaxial, and AES/EBU. A great-sounding asynchronous USB input is conventional. Include Bluetooth cordless connectivity via the APTX-compatible BT100, included complimentary with 851D. Inputs come in at as much as 24-bit/192kHz quality and are then upsampled prior to being output. You'll be astonished at the difference in quality Azur 851D makes to every source (set-top boxes to media streamers, smartphone docks to computers) you pass through it. In addition to ATF2 upsampling, Azur 851D owes its overachieving performance to dual Analog Devices AD1955 DACs, an audiophile-grade digital preamplifier (DSP), and a number of other premium parts, not the least of which is a toroidal transformer that provides smooth power delivery under pressure. Every component is hand-picked for supreme quality and unstinting sonics. As such, Azur 851D fits nearly every type of listener need and setup. It outputs to either out of balance
Asynchronous USB input and built-in headphone amplifier
Second-generation ATF upsampling all audio to 24-bit/384kHz
Outputs to either unbalanced RCA or balanced XLR
Three filter options to customize sound to your taste
Casework combines massive structural rigidity, damping elements, and acoustic-resonance control